Conference Programme

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Sunday 21 May (+)

17:30 Registration (Conference Site)
19:00 Welcome Reception (By the pool)

Host: Prof. Panos Papanastasiou (IWBDG Co-Chair, University of Cyprus)

Monday 22 May (+)

Olympus Room
Registration (Conference Site)
Opening ceremony (Olympus Room)
Welcome address by Prof. Euripides Papamichos (IWBDG Co-Chair, Aristotle University of Thessaloniki, Greece)
Welcome address by Prof. Fusao Oka (Intl Steering Committee IWBDG, Kyoto University, Japan)
Session 1. Experimental modeling of instabilities localization and degradation
Chair: Joseph F Labuz (University of Minnesota, USA)
Keynote session 1. Localisation precursors in geomaterials
Jacques Desrues (CNRS-Grenoble, France)
Measuring force-chains in opaque granular matter under shear
Eloïse Marteau, José Andrade
Propagation and evolution of strain localization in clay
Dunja Peric, Xindong Wu
Emergence of strain localization in porous rocks characterized by full-field measurement in plane strain condition
Pierre Bésuelle, Patrizia Lanatà
Coffee Break
Localization in plane strain compression of fluid-saturated rock
Roman Makhnenko, Joseph Labuz
3D particle-scale displacement gradient to uncover the onset of shear bands in sand
Andrew Druckrey, Khalid Alshibli
Micromechanical study of the mechanical response of crushable materials
Matteo Ciantia, Catherine O'Sullivan, Marcos Arroyo, Antonio Gens
Periodic stick-slip deformation of granular material under quasi-static conditions
Danuta Lesniewska, Magdalena Pietrzak, Michal Nitka, Jacek Tejchman
Session 2. Constitutive modeling and multi-physical coupling for localization, instabilities and degradation of geomaterials
Chairs: Jean Sulem (Ecole des Ponts ParisTech, France), Claudio di Prisco (Politecnico di Milano, Italy)
Cyclic elastoplastic constitutive model for soils based on non-linear kinematical hardening rule with volumetric and deviatoric kinematical parameters
Fusao Oka, Sayuri Kimoto, Hiroshi Matsuoka
Theoretical prediction of strain localization in anisotropic sand by non-coaxial elasto-plasticity
Maosong Huang, Zhouguan Chen, Xilin Lu, Xiaoqiang Gu
Modeling sand behavior under partially drained stress paths
Ali Lashkari, M.S. Yaghtin
Keynote Session 2. Physico-chemical degradation of mechanical properties of geomaterials
Thomasz Hueckel (Duke University, USA)
Prediction of sand instability under constant shear drained paths
Ali Lashkari, M.J. Alipour
A simplified, fully coupled dual-porosity reservoir geomechanics model for production in tight formations
Yarlong Wang, Fotios Karaoulanis, Xiang Li
Microscale analysis of the effect of suffusion on soil mechanical properties
Rodaina Aboul Hosn, Cong Doan Nguyen, Luc Sibille, Nadia Benahmed, Bruno Chareyre
Coffee Break
A numerical model of internal erosion for multiphase geomaterials
Sayuri Kimoto, Benjamin Loret, Fusao Oka, Toshifumi Akaki
Chemically induced strain localization in geomaterials
Ioannis Stefanou, Jean Sulem
Unstable creeping in geomaterials
Claudio di Prisco , Federico Pisanò
The effect of rotational and isotropic hardening on the onset of compaction bands
Chara Prassa, Sotiris Alevizos, Manolis Veveakis, Yannis F Dafalias
Localization of deformation for shearing of a rock layer with Cosserat microstructure and different couplings
Hadrien Rattez, Ioannis Stefanou, Manolis Veveakis, Thomas Poulet, Jean Sulem
End of session
IWBDG Scientific and Advisory Board MEETING
Dinner on your own


Olympus Room
Hans Muhlhaus Tribute
Chairs: Arcady Dyskin, Elena Pasternak (University of Western Australia, Australia)
08:30 Opening (Olympus Room)
Welcome address by Profs. Elena Pasternak, Arcady Dyskin (Co-Chair, University of Western Australia)
08:45 Opening Keynote. Density discontinuities in gravity driven granular flows
Hans Muhlhaus (University of Queensland, Australia), Louis Moresi (University of Melbourne, Australia)
09:25 Keynote HM1. Interplay between symmetry and anti-symmetry in the evolution of localized buckle patterns
Martin Paesold, Timothy Dodwell, Giles Hunt (Qintiq, Australia; University of Exeter, UK; University of Bath, UK)
10:00 Keynote HM2. Coupled phenomena and instability in fault zones
Jean Sulem, Ioannis Stefanou (Ecole des Ponts ParisTech, France)
10:35 Coffee Break
11:00 Modelling of shear localization during granular flow within non-local hypoplasticity using Material Point Method
Jacek Tejchman, Pawel Hajko, Wojciech Solowski
11:25 Strain localization with rate dependent models versus Cosserat continuum: an illustrative example
Ioannis Stefanou, Jean Sulem
11:50 Physical and mathematical modeling of erosion processes across the scales
Alexander Scheuermann, H-B Muhlhaus, Sergio Galindo-Torres, Mohammad Aminpour, HMD Harshani, Tilman Bittner, Peter To, Maziar Gholami Korzani, Dorival Pedroso, Ling Li, Lutz Gross
12:15 Customized coarse models for highly heterogeneous materials
Timothy Dodwell, Anhad Sandhu, Robert Scheichl
12:40 Group Photo
13:00 Lunch
14:20 Keynote HM3. Modelling the Influence of loading paths on grain fragmentation using a micro-polar continuum description
Erich Bauer (Graz University of Technology, Austria)
14:55 Keynote HM4. Numerical simulations of debris flows and its application in hazard assessments
Kam Tim Chau (Hong Kong Polytechnic University)
15:30 Instability of geomaterials caused by transitional negative stiffness
Arcady Dyskin, Elena Pasternak
15:55 Localisation in surface process models — Computational challenges
Louis Moresi, Ben Mather, Romain Beucher
16:20 Coffee Break
16:40 Fracking processes in saturated soil and rock
Wolfgang Ehlers
17:05 Opening of mode I fractures in geomaterials with rotating particles: small-scale Cosserat continuum approach and its verification
Arcady Dyskin, Elena Pasternak, Maxim Esin, Yuan Xu
17:30 DEM modelling of instability of particulate materials - Transitional negative stiffness
Yuan Xu, Elena Pasternak, Arcady Dyskin
17:50 The effect of constriction in hydraulic fracturing
Junxian He, Elena Pasternak, Arcady Dyskin, Maxim Lebedev, Boris Gurevich
18:10 End of session
18:45 Tour to Limassol old center
20:00 Muhlhaus Gala Banquet
Announcement of the 12th IWBDG 2020 host group

Wednesday 24 May (+)

  Olympus Room Athina Room
  Session 3. Numerical modeling of failure, localized deformation and gravity driven flows
Chairs: Manuel Pastor (University of Madrid, Spain), Pablo Mira (Cedex, Spain), Claudio Tamagnini (University of Perugia, Italy)
Session 4. Soil-tool/machine interaction
Chairs: Khalid Alshibli (University of Tennessee, USA), Mustafa Alsaleh (Caterpillar, USA)
08:40 Keynote Session 4. Sand to mud to fording: Modeling and simulation for off-road ground vehicle mobility analysis
Dan Negrut, Hammad Mazhar (University of Wisconsin-Madison, USA)
Olympus Room
09:20 Micromechanical modelling of suffusion: towards the stability analysis of hydraulic structures
Antoine Wautier, Stéphane Bonelli, François Nicot
Large deformation modelling of soil-machine interaction in clay
Chong Peng, Wei Wu
09:40 Comparison of the Rudnicki-Rice and Vermeer bifurcation criteria
Marte Gutierrez
Tracing the salt crystallization front in limestone using the DRMS
Sevasti Modestou, Ioannis Ioannou
10:00 Second gradient model and a novel cohesive element for plane stress localization problems in damaged concrete
Panagiotis Kotronis, Frédéric Collin, Gwendal Jouan, Marc Soufflet
Analysis of bearing capacity in sand under eccentric and inclined loading using a bounding surface plasticity model
Dimitrios Loukidis, Nektaria Ygeionomaki
10:20 Coffee Break
  Olympus Room Athina Room
  Session 3 (continued). Numerical modeling of failure, localized deformation and gravity driven flows
Chairs: Manuel Pastor (University of Madrid, Spain), Pablo Mira (Cedex, Spain), Claudio Tamagnini (University of Perugia, Italy)
Session 5: Micromechanics and multi-scale analysis of instabilities and degradation I
Chairs: Gioacchino Viggiani (University of Grenoble Alpes, France), Jose Andrade (California Institute of Technology, USA)
10:40 Keynote Session 3. Multiscale poromechanics: Fluid flow, solid deformation, and anisotropic plasticity
Ronaldo Borja (Stanford University, USA)

Olympus Room
11:20 Fast landslide propagation: alternative modelling techniques
Manuel Pastor, M. Martín Stickle, A. Yagüe, D. Manzanal, P. Mira, J.A. Fernandez Merodo, P. Dutto
A micro-mechanical analysis of induced anisotropic damage in initially anisotropic materials
Jianfu Shao, Wanqing Shen, Hamid Ghorbanbeigi
11:40 Bifurcation criteria for localisation in multi-physical models
Manolis Veveakis, Thomas Poulet, Klaus Regenauer-Lieb
Cemented sands: from field deformation to inter-particle bonding
Ilaria Soriano, Elli-Maria Charalampidou, Helen Lewis, Gioacchino Viggiani, Gary Couples, Jim Buckman, Edward Andò
12:00 Review and comparison of numerical implementations for Cosserat plasticity
Fahad Gulib, Stefanos-Aldo Papanicolopulos
Initiation and propagation of compaction bands in a porous sandstone with pre-induced shear bands
Elli-Maria Charalampidou, Sergei Stanchits, Georg Dresen
12:20 Material point method modelling of landslides with coupled segregation
Benjy Marks, Itai Einav, Pierre Rognon
On the three-dimensional extension of the micromechanically-based H-model
Hao Xiong, Zhenyu Yin, Francois Nicot
12:40 Microstructural effects on strain localization in a multiscale model for hydro-mechanical coupling
Bram van den Eijnden, Pierre Bésuelle, Frédéric collin, René Chambon
Failure of crushable grains using a three-dimensional discrete element model
François Nader, Claire Silvani, Irini Djeran-Maigre
13:00 End of sessions
14:00 Kourion and Paphos archaeological sites
18:30 Paphos old port, dinner on your own
21:00 Back to Limassol

Thursday 25 May (+)

  Olympus Room Athina Room
  Session 6. Geomechanics for Energy, Environment and Geophysics
Chairs: APS Selvadurai (McGill Univ, Canada), Klaus Regenauer-Lieb, Manolis Veveakis (University of New South Wales, Australia)
Session 7. Micromechanics and multi-scale analysis of instabilities and degradation II
Chairs: Gioacchino Viggiani (University of Grenoble Alpes, France), Jose Andrade (California Institute of Technology, USA)
08:40 Keynote Session 6. An X-FEM algorithm for modeling of multi-zone hydraulic fracturing in saturated porous media
N Khalili, Mohammad Vahab (University of New South Wales, Australia)
Olympus Room
09:20 Seismic wave field generation in heterogeneous geological media containing multiple cavities
Ioanna-Kleoniki Fontara, Petia Dineva, Frank Wuttke, George Manolis
Strain localization in elastic-plastic high performance fiber reinforced cementitious composites subjected to plane stress loading
Marta Miletic, Dunja Peric
09:40 Multiscale investigation of microcrack-induced instability in rocks
Mahdad Eghbalian, Richard Wan
Hill's lemma of homogeneity for granular materials and discrete structures
Denis Caillerie
10:00 Borehole strengthening in gas wells from near borehole drying
Euripides Papamichos
Borehole instabilities in granular rocks revisited: a multiscale perspective
Huanran Wu, Ning Guo, Jidong Zhao
10:20 Coffee Break
10:40 Keynote Session 7. Multiscale modelling of strain localisation in sand
Jidong Zhao (Hong Kong University of Science and Technology, Hong Kong)
11:20 Wormhole development in carbonate rocks during CO2 acidized water flow
Patrick Selvadurai, Cyrille Couture
Relative humidity induced degradation of mechanical behaviors of a clayey rock under constant strain rate loadings
Zaobao Liu, Jianfu Shao
11:40 Geomechanical modelling of pore collapsing in soft porous rocks: insights from triaxial experiments and numerical simulations in sandstone, mudstone and shale samples
Mustafa Sari, Thomas Poulet, Manolis Veveakis
Numerical analyses on formation of vortex-/anti-vortex- structures in granular bodies using DEM
Jacek Tejchman, Jan Kozicki, Michal Nitka
12:00 The role of acidizing in hydraulic fracturing, from a chemo-hydro-geomechanical point of view
Manman Hu, Manolis Veveakis, Thomas Poulet, Klaus Regenauer-Lieb
Restoring mesh independency in FEM-DEM multi-scale modelling of strain localization using second gradient regularization
Jacques Desrues, Albert Argilaga, Stefano Dal Pont, Gael Combe, Denis Caillerie, Trung Kien Nguyen
12:20 Modelling of the progressive failure in a wellbore multilateral junction with Cosserat model
Panos Papanastasiou
Strain localization as a problem of topological changes in mesoscopic granular structures
Nejib Hadda, Richard Wan, Francois Nicot, Felix Darve
12:40   Instability analysis of granular media via a purely micromechanical constitutive model
Mehdi Pouragha, Richard Wan
13:00 Lunch
Olympus Room
Session 8. Micromechanics and multi-scale analysis of instabilities and degradation III
Chairs: Gioacchino Viggiani (University of Grenoble Alpes, France), Jose Andrade (California Institute of Technology, USA)
14:20 Keynote Session 8. Constitutive modeling of granular geo-materials under high-speed impact
Takashi Matsushima (University of Tsukuba, Japan)
15:00 Multiscale simulation of chemical fault reactivation
Martin Lesueur, Manolis Veveakis, Thomas Poulet
15:20 Full field measurements of compaction localization in porous rocks by 3D digital image correlation
Athanasios Papazoglou, Gioacchino Viggiani, Christophe Dano, Giuseppe Buscarnera
15:40 Strain localisation in sand at the grain-scale: behaviour upon load reversal and multiscale considerations
Edward Andò, Erminio Salvatore, Jacques Desrues, Pascal Charrier, Jean-Benoit Toni, Gioacchino Viggiani
16:00 Analysis of shear bands in sand under reduced gravity conditions
Jason Marshall, Ryan Hurley, Daniel Arthur, Ivan Vlahinic, Brian Trease, Karl Iagnemma, Carmine Senatore, Jose Andrade
16:20 Workshop Closure